Lot of 36 Duracell – Hearing Aid Batteries Size 675 (Blue) I purchased these 4/21/18 at a local supermarket. The front of the package says that they are guaranteed while in storage up to 4 years. These are guaranteed to be good for another year and a half. „My dad wears hearing aids. We feel these Duracell batteries last longer than RayOVac & Energizer. My dad LOVES the longer tabs. Much easier for the elderly to pick up the battery and install them 😊“ Size 675 Blue: Duracell size 675 hearing aid battery is designed so it’s extra-long tab is simple to handle, and its packaging easy to openEase of Installation: Designed with an extra long tab making Duracell batteries easy to handle and install.Long Lasting Power: Duracell batteries for hearing aids are engineered for long lasting performance.Guaranteed for 4 years in Storage: Duracell Hearing Aid batteries are guaranteed for 4 years in storage.#1 Most Trusted Battery by Hearing Aid Users: Duracell Hearing Aid batteries are available in 4 sizes 10 (Yellow), 312 (brown), 13 (Orange), 675 (Blue).